• 한국철도학회논문집
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• 제12권5호
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• pp.744-750
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• 2009

기존 연구결과에 따르면, 시스템의 안전성에 가장 큰 영향을 주는 요인 중 하나는 인적수행도의 저하인 것으로 밝혀졌다. 따라서 인적수행도 저하 방지를 통한 사건/사고의 방지는 원자력이나 철도와 같이 안전을 우선적으로 고려해야 하는 산업체의 경우 반드시 고려되어야 하는 조건이다. 이를 위해서는 인적수행도 저감의 원인의 체계적 파악 및 이에 근거한 효과적인 관리가 선행되어야 하기 때문에, 대표적인 인적수행도 저하 원인으로 알려져 있는 직무복잡도를 객관적으로 평가할 수 있는 방법의 개발이 필요하다. 이러한 필요성에 따라, 본 논문에서는 원자력발전소의 절차화된 직무에 대한 복잡도를 평가할 수 있는 TACOM 척도를 사용하여 KTX 기장이 수행해야 하는 운전직무의 복잡도를 정량적으로 평가한 후 그 결과를 주관적 직무부하 평가 방법인 NASA-TLX 결과와 비교하여 적합성을 검증하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.1082-1087
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• 2006

Human factors still plays a significant role in railway accidents. The accidents often resulted from multiple causes of hardware failures and human errors. So to ensure the safety of railway operations, human error should be effectively prevented and managed. Among several factors influencing human performance, task load (or task complexity) is well known as a major contributor to human error. In order to reduce the potential of human error, a systematic analysis should be undertaken to evaluate task load and to reduce it by modifying task process and/or education&training. In this paper, we proposed a systematic framework for railway industry to perform task analysis and to evaluate task load, and applied it to KTX operational tasks. According to the application study, we identified 14 generic task types of KTX operation. And also this paper shows the quantitative task load of those generic tasks which were analyzed by NASA-TLX method.

• 대한안전경영과학회지
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• 제10권4호
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• pp.47-56
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• 2008

This study suggest a way to improve duty process of KTX(Korea Train Express) high-speed train driver. A new operating system which based on safety was introduced to operate high-speed train which travel above 300km/h on the high-speed railroad but below 200km/h on the general railroad. There were some studies on the operation of high-speed train which travel on the high-speed railroad and on the general railroad with safety. However they overlooked the elements of human errors. The duty-load of KTX train driver's 14 basic operation processes was measured using NASA-TLX and found four processes with high duty-load. In this paper, critical tasks of the high duty-load processes are determined using a questionnaire. Some suggestions which include the improvement of facilities, operating system and operating skill are proposed to lighten duty-load of the critical tasks. The validity of the proposed new task processes is demonstrated by making question to KTX train driver. To use this results cost-benefit analysis, hazards analysis etc. should be performed additionally.

• 대한안전경영과학회지
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• 제16권2호
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• pp.1-9
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• 2014

This study tried to propose plan to prevent human error of railroad driver among human error of railroad worker which takes great share in railroad accident. For this, in order to maintain correlation between the accident actually occurred after the opening of high-speed railroad and experience of accident that did not happened, survey on respondent was analyzed by conducting survey on KTX captain who is working in driving work of high-speed railroad, and instruction management team manager who manages KTX captain and captain. This thesis classified the factors by human factor, job factor, environment factor, organization factor, and established human error management model by comparing and analyzing how each factors have spatial interrelations with a railroad accident. The purpose of this study is to contribute to make safe railroad, and reliable railroad by preventing human error accident by minimizing human error of high-speed railroad drivers, and improving driving workers to cope accurately and fast with irregularities through various institutional improvement, improvement of driving facilities, improvement of operating room environment, and improvement of education system.